A simple protocol to directly access γ-amino acid derivatives by intermolecular regioselective hydroamination of trichloroethyl alkenyldiazoacetates with carbamate using a silver tetrafluoroborate catalyst is described. Density functional theory (DFT) calculations to analyze the reaction mechanism revealed that multiple attractive interactions occur in a transition state to promote the vinylogous addition
Electrostatically-directed Pd-catalysis in combination with C–H activation: site-selective coupling of remote chlorides with fluoroarenes and fluoroheteroarenes
作者:William A. Golding、Robert J. Phipps
DOI:10.1039/d0sc00105h
日期:——
Electrostatically-directed oxidative addition is compatible with a subsequent C–H activation step, enabling site-selective coupling of remote chlorides with fluoroarenes and fluoroheteroarenes.
Highly Regio- and Diastereoselective Synthesis of CF<sub>3</sub>-Substituted Lactones <i>via</i> Photoredox-Catalyzed Carbolactonization of Alkenoic Acids
use of a Ru photocatalyst and Umemoto’s reagent as a CF3 source is key in the present carbolactonization. This is the first example of a highly endo- and diastereoselectivesynthesis of CF3-substituted five-, six-, and seven-membered ring lactones from internal alkenoic acids.
A butenoic or propenoic acid derivative having the following formula in which G is an aryl or a heterocyclic ring, R11 and R12 are hydroben or an alkyl, X is sulfur or oxygen, R2 and R3 are hydrogen, an substituent such as an alkyl and J is pyridyl or phenyl having substituents and a heterocyclic ring may be formed between R2, R3 and J is provided here and is useful in the pharmacological field.